package com.example.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.reggie.common.CustomException;
import com.example.reggie.entity.Category;
import com.example.reggie.entity.Dish;
import com.example.reggie.entity.Setmeal;
import com.example.reggie.mapper.CategoryMapper;
import com.example.reggie.service.CategoryService;
import com.example.reggie.service.DishService;
import com.example.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    //    菜品的service
    @Autowired
    private DishService dishService;

    //    套餐的service
    @Autowired
    @Lazy
    private SetmealService setmealService;

    /**
     * 根据ID删除分类，删除前需要进行判断
     *
     * @param id
     */

    @Override
    public void remove(Long id) {
//        查询当前分类是否关联了菜品，如果有关联的菜品，就直接抛出业务异常
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
//        添加查询条件，根据分类ID查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId, id);
        int count1 = (int) dishService.count(dishLambdaQueryWrapper);

        if (count1 > 0) {
            //已经关联菜品 抛出一个业务异常
            throw new CustomException("当前分类已经关联了菜品，不能删除！");
        }
//        查询当前分类是否关联了套餐，如果有关联的套餐，就直接抛出业务异常

        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
//        添加查询条件，根据分类ID查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId, id);
        int count2 = (int) setmealService.count(setmealLambdaQueryWrapper);

        if (count2 > 0) {
            //已经关联套餐 抛出一个业务异常
            throw new CustomException("当前分类已经关联了套餐，不能删除！");
        }


//        删除分类
        super.removeById(id);

    }
}
